Convertible one-pipe furnace



Apr. 24, 1923. 1,452,63?

J; DE VRIES CONVERTIBLE ONE- PIPE FURNACE Filed April 13, 1921 3 Shets-Sheet 1 I v gmyml'c z doh'n de Vnes Cinema Apr.24-,'1'923. 1,452,637

' J. DE VRIES CONVERTI BLE ONE- PI PE FURNACE I Filed April 13 1921 3 Sheets-Sheet John de Vries nome.

Patented Apr. 24, 1923.

E 3* T A T E S I JOHN m; VRIES, OF GENEVA, NEW

1,452,637 Parent entree.

INC., OF GENEVA, NEW YORK, A CORPORA'JIIOIhTv OF NEW YORK.

CONVERTIBLE ONE-PIPE FURNACE.

To all whom it may concern:

Be it known that I, JOHN DE VRIES a citizen of the United States, residing at eneva,

in the county of Ontario and State of New York, have invented certain new and useful Improvements in Convertible One-Pipe Furnaces, of which the following is a specification.

The object of this invention is to provide a new and improved form of single pipe furnace that is easily convertible into a two or three pipe furnace.

This and other objects of this invention will be fully illustrated in the drawings, de-

scribed in the specification and pointed out in the claims at the end thereof.

In the drawings,

Fig. 1 is a vertical section through the furnace, showing it arranged for a one pipe connection.

Fig. 2 is a vertical section through the furnace, showing it arranged for a three pipe connection.

Fig. 3 is a horizontal section on the line 3"-3" of Fig. 2.

Fig. 4 is a horizontal section on the line 4P-4 of Fig. 1.

In the drawings, indicate like parts.

In the drawings, reference numeral 1 indicates the base of the furnace, on which is placed the casing 2 of the ash pit, on top of which is placed a grate section 3 and the fire pot sections 4: and 5 and the dome 6. On top of the dome is placed the flue section 7 Surrounding the furnace is provided the inner casing 8 and the outer casing 9, which casings are arranged concentrically and spaced apart so as to provide a cold air, down draft air space between the two casings and a hot air up draft space between the inner casing and the fire pot. lhe inner casing is provided with double walls, which are surmounted by an annular strip 27 having an U-shaped head 28 therein with a flange 29 on either side of the bead. The bead rests on the doublewalls with the opening of the bead facing inwardly. The flanges overlap the inner wall on the inside. An inner extension casing 8 and an outer extension casing 12 are provided connecting the inner and outer casings with the register. Above these extensions is placed the register, which register has an inner section 10 and an outer section 11, through which the air can pass like reference numerals in the direction indicated by the arrows. See Fig. l.

It is frequently desirable to change the furnace from a one-pipe connection to a two or three pipe connection and provision is made therefor inthe-manner'that will now be described.

Of the outer casing, the top section 12 is removable and can be omitted on the erection of a furnace, in which case a small register or the inner section of the register alone will be used. In such case, the opening that is left between the outer and inner sections will be closed by the collar or plate 13, such as is shown in Fig. 2, which plate is made up of four segmental pieces having their inner circular edges turned up to form a flange as indicated at lt and having their diagonal or radial edges turned up to form flanges as indicated at 15 by which the four segmental pieces can be fastened together. The outer edge of each of the segmental pieces is bent up to form a downwardly open channel as indicated at 16, which fits down over the up per edges of the outer casing and forms a complete covering therefor, preventing any air from passing in or out of the casing at this point.

The outer casing is provided with the cone shaped section indicated at 20 and where the furnace is to be used as a two or three pipe furnace, this casing is cut away to form suitable openings 21, 21, as indicated in Fig. 2, which openings are surrounded by the cast iron collars 22, which collars are riveted or bolted to the outer casing. To these collars can be readily joined the cold air pipes 23, 23, which are pitched on an incline and end with vertical sections 24; that connect with the boxes 25, which are covered with the registers 26 set in the floor. It will be understood that the furnaces will be regularly made as shown in Fig. 1 and the local dealer will be supplied with one or more of the caps or covers shown in Fig. 3, by. the use of which the furnace can be converted either before or after installation into a two or three pipe furnace as may be desired.

I claim:

1. In a furnace the combination of an inner and an outer shell, said inner shell having double walls, an annular strip having a bead formed thereon overlapping the u per ends of the double walls of said inner s ell, an upwardly projecting flange formed by YORK, assrenoa T0 PHILLIPS & oLaazrsrovnjoo,

said annular strip, an extension casing adapted to engage said flange and extend said inner casing, a register supported above said inner extension casing and a removable extension adapted to be mounted on said outer shell and extending to said register 2. In a furnace, the combination of an outer and an inner shell, said inner shell projecting above said outer shell, a removable extension for said outer shell to extend said outer shell to the level of theupper end of said inner shell, and a register supported on top of said inner shell and said extension of said outer shell to allow air to pass down between said inner and said outer shell and up through said inner shell.

3. In a furnace, the combination of an outer shell and an inner shell, said inner shell projecting above said outer shell, a removable cover adapted to be placed on top of said outer shell to cover the space between said inner and said outer shell, and ducts leading into said outer shell to admit air into the space between said inner and said outer shell, said inner shell being open at the bottom to allow the air to pass down from between said inner and said outer shell and enter said inner shell at the bottom and pass up through said inner shell and out through the top thereof a register supported on top of said inner shell.

In testimony whereof I affix my signature.

JOHN DE VRIES. 

